<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

    <input type="text" value="aaaa">
    <div></div>
</body>


<script src="js/jquery.min.js"></script>
<script>
    $(() => {
        $('div').html('aaa');
        alert($('input').val());
    });
</script>

</html>